Senators blast White House after briefing on journalist’s death Video

Now Playing: GOP senators: Saudi prince involved in Khashoggi murder

Now Playing: Pompeo: ‘No direct reporting’ connecting Saudi Crown Prince to Khashoggi murder

Now Playing: Dems threaten to block Republican from taking seat amid election fraud investigation

Now Playing: Senators blast White House after briefing on journalist’s death

Now Playing: Trump administration recommends postal rate increases

Now Playing: Former Sen. Bob Dole gives final salute as Bush lies in state

Now Playing: Wisconsin GOP takes aim at newly-elected Democratic governor

Now Playing: ‘Zero question’ that Saudi crown prince ordered journalist killing: Corker

Now Playing: Bush family greets mourners at the Capitol Rotunda as George H.W. Bush lies in state

Now Playing: Congressman Steve Scalise talks recovery and his stance on gun control after being shot

Now Playing: Is Robert Mueller wrapping up his investigation?

Now Playing: President Trump and first lady visit Bush family at Blair House

Now Playing: Mueller expected to file Flynn sentencing memo

Now Playing: Sen. Graham: Saudi crown prince ‘complicit’ in Khashoggi murder

Now Playing: Former President George H.W. Bush lies in state in US capital

Now Playing: President Trump, first lady pay respects to former President George H.W. Bush

Now Playing: Nate Silver reviews the FiveThirtyEight Midterm forecasts

Now Playing: ‘I’m here’: Parts of former President George H.W. Bush’s diary released

Now Playing: SPECIAL REPORT: Ceremony for former President George H.W. Bush at US Capitol

Now Playing: Man paralyzed by rare condition stands for first time to propose